The modified dual reciprocity boundary elements method and its application for solving stochastic partial differential equations. (September 2015)

• Record Type: Journal Article
• Authors: Dehghan, Mehdi; Shirzadi, Mohammad
• Is Part Of: Engineering analysis with boundary elements. Volume 58(2015:Sep.)
• Page Start: 99
• Page End: 111
• Publication Date: 2015-09
• Subjects: Dual reciprocity boundary elements method (DRBEM) -- Stochastic partial differential equations (SPDEs) -- Radial basis functions (RBFs) -- Wiener process; Boundary element methods -- Periodicals; Engineering mathematics -- Periodicals; Équations intégrales de frontière, Méthodes des -- Périodiques; Mathématiques de l'ingénieur -- Périodiques; Boundary element methods; Engineering mathematics; Periodicals; 620.00151
• DOI: 10.1016/j.enganabound.2015.03.013
• Languages: English
• ISSNs: 0955-7997

Abstract

Abstract: This paper proposes a numerical method based on the dual reciprocity boundary elements method (DRBEM) to solve the stochastic partial differential equations (SPDEs). The concept of dual reciprocity method is used to convert the domain integral to the boundary. The conventional DRBEM starts with approximation of the source term of the original PDEs with radial basis functions (RBFs). Due to the fact that the nonhomogeneous term of SPDEs considered in this paper involves Wiener process, the traditional DRBEM cannot be applied. So a modification of it is suggested that has some advantages in comparison with the traditional DRBEM and can be developed for solving the SPDEs. The time evolution is discretized by using the finite difference method, while the modified DRBEM is proposed for spatial variations of field variables. The noise term is approximated at the collocation points at each time step. We employ the generalized inverse multiquadrics (GIMQ) RBFs to approximate functions in the presented technique. To confirm the accuracy of the new approach, several examples are employed and simulation results are reported. Also the convergence of the new technique is studied numerically.